package com.sky.service.impl;


import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetMealDishMapper setMealDishMapper;


    /**
     * 新增菜品
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();

        BeanUtils.copyProperties(dishDTO,dish);

        dishMapper.insert(dish);

        Long dishId = dish.getId();

        List<DishFlavor> dishFlavors = dishDTO.getFlavors();
        if(dishFlavors !=null && dishFlavors.size()>0){
            dishFlavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(dishFlavors);
        }
    }


    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page =dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }


    /**
     * 菜品删除
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
//        判断当前菜品是否在售
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE){
//                当前菜品在售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
//        判断当前菜品是否关联套餐
        List<Long> setMealIds = setMealDishMapper.getSetMealIdsByDishIds(ids);
        if(setMealIds !=null && setMealIds.size()>0){
//            该菜品关联的有套餐 不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
//        删除能删除的菜品
        for (Long id : ids) {
            DishMapper.deleteById(id);
            dishFlavorMapper.deleteByDishId(id);
        }
    }


    /**
     * 根据id查询菜品和对应的口味
     * @param id
     * @return
     */
    public DishVO getByIdWithFlavor(Long id) {
//        根据id查询菜品
        Dish dish = dishMapper.getById(id);
//        根据菜品id查询该菜品的口味
        List<DishFlavor> dishFlavors =dishFlavorMapper.getFlavorByDishId(id);
//        把菜品和口味封装的DishVo中
        DishVO dishVO =new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 修改菜品和味道
     * @param dishDTO
     */
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
//        修改菜品原有的信息
        dishMapper.update(dish);
//        删除原有的口味
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
//        获取新的口味
        List<DishFlavor> dishFlavors =dishDTO.getFlavors();
        if(dishFlavors !=null && dishFlavors.size()>0){
            dishFlavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dish.getId());
            });
            dishFlavorMapper.insertBatch(dishFlavors);
        }
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> getDishWithFlavors(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getFlavorByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }
        return dishVOList;
    }

    /**
     * 菜品的起售停售
     * @param id
     * @param status
     */
    public void startOrStop(Long id, Integer status) {

        dishMapper.startOrStop(id,status);
    }
}
